21373709

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{4177}}^1$

素因数の和:4244

約数の個数: 16

約数和(自身を含む): 26471808

約数和(自身を除く): 5098099

約数列:

[1, 7, 17, 43, 119, 301, 731, 4177, 5117, 29239, 71009, 179611, 497063, 1257277, 3053387, 21373709]

約数ペア:

[(1, 21373709), (7, 3053387), (17, 1257277), (43, 497063), (119, 179611), (301, 71009), (731, 29239), (4177, 5117)]